Vacuum-controlled electric switch for gasoline filling stations



Dec. 19, 1922.

c. 0. McGRAW ET AL.

VACUUM CONTROLLED ELECTRIC SWITCH FOR GASOLINE FILLING STATIONS.

3 SHEETS-SHEET I.

FILED AUG. 26,192].

Dec. 19, 1922. w 1,439,114,

C. 0. McGRAW ET AL.

VACUUM CONTROLLED ELECTRIC SWITCH FOR GASOLINE FILLING STATIONS.

FILED AUG. 26, 1921. 3 SHEETS SHEET 2- gnue ufow Z $1 M ,1; ay Jammy ll JifiwrZdr C. 01 McGRAW ET AL-.

FILED AUG. 26, 1921.

VACUUM CONTROLLED ELECTRIC SWITCH FOR GASOLINE FILLING STATIONS.

A 6. n/ al a i Ms 1 W Z 1 a 1 TJ Z fl 4 Q 6 3 5W 2 2 ji 7 1 flv a. 1 ]J J \a a 3 g w z 0 an m fiw p J 7 J3 9 1 J Dec. 19, 1922.

vacuum pump also moves downwardly a link 76 pivoted at its lower end at Tito the upper board OJIJTIGHlbQl of thebellows and'a t its upper end 7 8 to one end of a trigger actuating lever ,7 9. lhe trigger actuating lever 79 is pivoted at 80 to a depending post or support81proyidedat-its upper end with a threaded shank 82' and" secured by a nut in an opening in a fiberinsulating' head or plate 83. The fiber insulating plate 83 is therein iscontrolledby a tension devicecon- ""sisting of a rod 85 pivoted at jits lowerend 86 to": the upper board or 1 member {75 of the bellows and extendingithrnllgh an opening 179 is provided with 87. of the" fiber heador plate :83 and :having a coiled spring 88 disposed on its upper portion and interposed 1between the Said fiber header plate 83 and an adjusting jnut 8,9.

The adjusting" nut" 89 is -mount'ed on a threaded portion 90 of the rod"85, a washer i b'ein'g preferably interposed between the nut a'ndthe upper endot thecoiled'spring 88.

-fi adjusting. the nut" 8,9 on thethreaded portion 190 of the rod 85',

the tension of the spring and the pressure resulting "from the I exhausting ofthe airfroin the bellows may 3'5 7 insured.

be varied aml a positive action of the device The lever 7 9 is connected by a fiber insue ,xlat'ing 1ink 9l with a; trigger inemberjor lever 92 fulcruined at dnefend by a pin 93 .to a supporting and. binding post 94c and connected by side spr1n'gs95 witha trigger member or lever1196 carryinga contact' 97t "The lever a proficting 98 for ".r-" "'v; I

engag ng the trigger member 9.2 to l m t the J downward mo've'mentfot the same, and the said trigger member 92 is bigfurcated at its inner endqas shown-gto straddle the-binding post .94, andthe adj acentend o f the trigger I member or lever :96.

levers 92; a'nd'96 which are pivoted attheir inner ad acent ends-flare"@pro mded attheir outer or free ends with laterally extending "arms-.99 and NOV-having hooked-shaped terk initials .forithe' attachment of the endspgf side springs" 95. The trigger members constitute a"douhle trigger and are adapte upwl r'dly andjdowuwardly a sui i icient distanceto carrytheir tQTIIllllfllS and the side 3 93 whereby the springs operate to maintain )rijngs connectedtherewith abov eand below the "trigger members in either ifposition. niWthen the trigger members 191 layer a e :s'wung upwardlyv' the contact 9 7 wh lip eierably a platinum ,ppil i sa ds motor; while shown connected The ,triggermembers or it A the horizontal plane of thefulcrum or p vot and out of electrical engagement with a binding post 101 to close the circuit 71 to start theelectric motor 72 and operate the vacuum pump 14 and when the trigger members or levers are swung downwardly by the exhausting of air rromthe bellows, the contactpoint 97 is carried downwardly "out of contact with the binding post 101 and the contact portion thereof to open the circuit 7land stop the electric motor '72. Nhen the electric motor is in operation the air will bexexhausted from the receptacle 1 li 'hich will filll and operate vent and vacuum valves asset forth in the aforesaid applicationto cut off the vacuum from the receptacle and to connectthe receptacle with the atmosphere so that the receptacle will empty if the valve or cut ft 21 of the flexible discharge hose be opened and explained in the said application wlienthe receptacle empties the communication between the receptacle and the atmosphere is ,closed and the communication between the vacuu'm pipe or tube 26 and the receptacle ISOPGHBCl to reduce the vacuum within the bellows by perinitting the air from'the receptacle to enterthe bellows, sufficiently to expand the same and cause the .dcubledraw trigger to close the circuit 71 and again start themotor and the vacuumpuinpl The current for the circuit 71 maybe supplied from any suitable source and the electric with the vacuum pump by sprocket g'earing' 102 may be connected with the said pump by any other suitable gearing. a I In Figures 15"to 8 ,lfclusive, is illustrated anotheriform of yacuum device in which a cylinder 103 and a piston are employed in-- stead of a bellows. The cylinder 103 which is preferably arranged vertically as shown is rovided at itsflower end with an integ .'al head104an(l it has a removable head 105' at its oth end which may be secured to the cylindei. walls in any desiredmanner. fllhe piston comprises a dverticallv movable piston rod 106 extending throughan open ing 10'? in the lower head or end of the cylinder and surrounded thereat by a suit able stulfing; box .108 adapted to prevent ,The cylinder formed integ ral with a liquid reservoir 112 and communicates therewith by means of a passage 113to permit theoil to pass irom the cylinder-to the reservoir or tank 112and vice versa as tho piston moves downwardlyor upwardly. The

tank or. reservoir is'bolted or otherwise sen5 leakage otoil but any other'suitable fluid course be employed and said a new asses es flange 114 and having a supporting flange or portion 1182113 its upper end to iwhieh is sevured an insulating plate or heed 119. The {upper end or head of the vacuum cylinder 103 I is ro'vided with a central -o eiiiin -f l m which is threaded for the reception otthe lower end of an upwardly; eiitending tube or pipe 121"which is connected with and constitutes a branch oi? the VilCLllUl'l tube or )i 1e. 26 whereb when the vacuum tube or pipe 26 is closed to the reoeptacie of the gasolinefilling' stat on the vacuum pump will exhaust the. air in the upper portion of the cylinder andcause the piston to move "upwardly in the cylinder, the pressure of the atmosphere operating on the liquid withhot' the rod l25jis provided with upperand in the ten]: or reservoir 112 which descends as the piston ascends." The liquid is adapted toprevent leakage of air 'nto the vacuum.

The lower exterior portion ofthe vertically movable piston rod carries an arm 122 proj eating horizontally from the piston rod and connected at one endwith thesaine by sleeve. 123 or other suitable ineansland having its other end 124 slotted or bifurcated to straddlea niovable rod 125 slidjably mounted in avertical opening or here 126 in the vvall betweenthe cylinder and the tank and ertending above and below the said parts; i The lower depending portion lower tappets 127 and 128 preferably consisting ofsleeve's adjustably secured to the rod 125 by set screws or other suitable tastening devices and spaced from each other above endlbelow the horizontally projecting arm 122 of the piston rod and located in the path of the same. The arm adapted in its upwerdnnd downward inovement to engage the ends of the sleeves 11:27

and 128 and move the said rod 125113)- wardly and downwardly a sutlicient d1stwice to effect a throw or movement of a double trigger switch"mechanism which is mounted upon the insulating pleteor heed 119. By adjusting the sleeves127 and 128 the movement of the rod is controlled and 'prop'erlyjtimed.

eble devicetor controlling the pie (luced' by the Vacuum and l.'. positive operation of the vacu a downward.inovement the I closing; the electric cirhuit. T

device comprises a plurality of ghts 129 arranged upon a horizon. p. to or support 130 provided with a central rod. 131. extending upwardly from the plane oi -mpport and forming; a hanger for the suid.

weights. The rod is provided "its uppeif vmot 1" and the vacuum pt 11p and when the end With a hook 132 arranged in a slot or bifurcatlon 133 1n the lower end of the piston rod and'engaging a transverse pin tornmtionul a vamuun Within ti I ortastening device 13d which extends across bifurcation, The weights the said slot .or are provided Wltll lftdlfll slots 135 and one or more off the weights may be eniployml aecording to the pressure desired in the pro duotion of the vacuum; As soon as the der 13.6 cons tituti11g 2tStOpfOfll11f1itlng the 1 downward m vement ot the piston and preferably formed by asleeve but any other suitnble form of stop may of course beein I ployed for; thls purpose, This stop prevents the piston head from descending belowthe upper wellof the passage 113 connecting the interior of the cylinder with the tanker reservoir; r

The upper end of the verticallyinovahle switch actuated rod or member 125 is connected by a. link 13'? otiiber or other insulating material with the outer end of a ,triggerarm or lever138 whoh is pivoted at its inner end by a transverse pin or pivot 139to a binding.postjltOinounted upon the insulating head or plate 119'and also fornr. ing a support for the inner endlot a trigger ineniber'or leverlel extending from the binding post 141.0 in the .oppositedirection 'ti'oin the triggerineniber or lever 138.

The triggerineniber or leverfl-ti'l pi-m vided at its outer end with it center-t1" which is adapted to engage abindingg; pose 1 133 for closing the motor circuit. The binding posts 1 1 and 1 13 have shanks or stems which extend through the plate or head 119 end which arethrea ded for the reception ot clamping nuts 1&4; and 1415 for securing the terininals oi the wires of the motor circuit 71 to the said binding posts. The 1111i members or levers are provided adjacent their outer ends" with later-ally extending arms 146 and 1 1;? preferably provided. with hook-shaped terminals similar to tl'iose" ol the double trig e.- I

e the terminals of the side coil springs 1 18 locatedet opposite sides of the trigger nienibers or levers and adapted to be carriedby thevertioalinoveinent oft the rod or member125topoints new and. below the lwrimintplane of thepirot 139 M. the t er 111 Mrs or Y ill operate as a er w'teh nieinbeimm" hie hen tho M in either of their try. the

tionlotthe eylinrhurs 10?; the bers'or levers will be swun upper limit of the 1 p and will openthc inotor circuit p 5 :91. and stop the to ent i i l i 'vutnum is released and air porznitteo "ter the upper end. of the cylinderthe piston 7 i 1.1 O heretofore desciihed; and.

Cally movable rod 01' member having spaced end ofthe rod with the switch.

shoulders or tappets, means Carried by the In testimony whereof we hereunto afiix 10 piston rod and operating between the shoulour. hands.

ders of the tappets for actuating the verti cally movable rod or member, a switch 10- I CARL O. MGGRAVV.

cat-ed above thebcylinder and controlling the I I JAMES L. MARTIN.

through the lower end of the same, a vertimotor and means for connecting the upper 

